Added published field to quizzes - To be used for students ONLY to see published quizzes for their courses.

Changed seed file to put enroll student1 into course1 and quiz1 is published.
Quiz questions are generated in default hidden divs.
Script written to start quiz on page load.
Next question and previous question buttons show proper questions
Created new route for student response creation.
Created generate response method which shoot an ajax call to response create route.
Added relationship between Questions and responses.
Added Index value to Student Responses.
Changed GenerateResponse function to only add responses to js object.
On SubmitQuiz button function creates all responses at one time using js object
Does as migration states
Merge branch 'master' of https://github.com/bootcoder/Qu-est
Merge branch 'master' into take_quizzes

Conflicts:
	app/assets/stylesheets/quizzes.css.scss
resolve conflicts
Merge pull request #16 from bootcoder/take_quizzes

Take quizzes